SCHUNK ROTA THW3 Translation Of Original Operating Manual
Power lathe chuck with jaw quick-change
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- Assembly and operating manual (56 pages) ,
- Assembly and operating manual (52 pages)
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Summary of Contents for SCHUNK ROTA THW3
- Page 1 Translation of Original Operating Manual Power Lathe Chuck with Jaw Quick-change ROTA THW3 Assembly and Operating Manual Superior Clamping and Gripping...
- Page 2 Imprint Imprint Copyright: This manual is protected by copyright. The author is SCHUNK GmbH & Co. KG. All rights reserved. Technical changes: We reserve the right to make alterations for the purpose of technical improvement. Document number: 1440828 Version: 03.00|22/07/2021|en...
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Page 3: Table Of Contents
3.3.2 Calculation example: Required initial clamping force Fsp0 for a given rpm n ........................26 3.3.3 Calculation of the permissible rpm nzul in case of a given initial clamping force Fsp0 ....................27 3.4 Grades of Accuracy ....................28 3.5 Permissible imbalance .................... 28 03.00|1440828 ROTA THW3 |en... - Page 4 7.4 Disassembling and assembling the chuck .............. 42 8 Spare parts ......................47 9 Drawing........................49 10 Declaration of Incorporation ................... 52 11 Appendix on Declaration of Incorporation, as per 2006/42/EC, Annex II, No. 1 B ..53 03.00|1440828 ROTA THW3 |en...
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Page 5: General
Non-observance will inevitably cause irreversible injury or death. WARNING Dangers for persons! Non-observance can lead to irreversible injury and even death. CAUTION Dangers for persons! Non-observance can cause minor injuries. CAUTION Material damage! Information about avoiding material damage. 03.00|1440828 ROTA THW3 |en... -
Page 6: Applicable Documents
The documents marked with an asterisk (*) can be downloaded on our homepage schunk.com 1.1.3 Sizes This operating manual applies to the following sizes: • ROTA THW3 200-52 • ROTA THW3 225-66 • ROTA THW3 265-81 • ROTA THW3 315-104 • ROTA THW3 400-128 •... -
Page 7: Scope Of Delivery
General Scope of Delivery Power lathe chuck in the version ordered Set of base jaws Mounting screws Jaw change key Eye bolt from size 225 Assembly key from size 265 Operating manual 03.00|1440828 ROTA THW3 |en... -
Page 8: Basic Safety Notes
• if workpieces are not clamped properly, paying particular attention to the clamping forces specified by the manufacturer. • if it is used in working environments that are not permissible. • if the product is operated without a protective cover. 03.00|1440828 ROTA THW3 |en... -
Page 9: Constructional Changes
Use of unauthorized spare parts Using unauthorized spare parts can endanger personnel and damage the product or cause it to malfunction. • Use only original spare parts or spares authorized by SCHUNK. Chuck jaws Requirements of the chuck jaws Accumulated energy can make the product unsafe and risk the danger of serious injuries and considerable material damage. -
Page 10: Environmental And Operating Conditions
• After a collision, the lathe chuck and the chuck jaws must be subjected to a crack detection test before being used again. Damaged parts must be replaced with original SCHUNK spare parts. • Renew the chuck jaw mounting bolts if there are signs of wear or damage. -
Page 11: Personnel Qualification
Service personnel of Due to its technical training, knowledge and experience, service the manufacturer personnel of the manufacturer is able to perform the delegated tasks and to recognize and avoid possible dangers. 03.00|1440828 ROTA THW3 |en... -
Page 12: Personal Protective Equipment
• Eliminate any malfunction immediately. • Observe the care and maintenance instructions. • Observe the current safety, accident prevention and environmental protection regulations regarding the product's application field. 03.00|1440828 ROTA THW3 |en... -
Page 13: Transport
Handling of disposal The incorrect handling of disposal may impair the product's safety and cause serious injuries as well as considerable material and environmental harm. • Follow local regulations on dispatching product components for recycling or proper disposal. 03.00|1440828 ROTA THW3 |en... -
Page 14: Fundamental Dangers
Falling loads may cause serious injuries and even death. • Stand clear of suspended loads and do not step into their swiveling range. • Never move loads without supervision. • Do not leave suspended loads unattended. 03.00|1440828 ROTA THW3 |en... -
Page 15: Protection During Commissioning And Operation
Before starting up the machine or automated system, check that the EMERGENCY STOP system is working. Prevent operation of the machine if this protective equipment does not function correctly. 03.00|1440828 ROTA THW3 |en... -
Page 16: Notes On Particular Risks
• The machines and equipment must fulfill the minimum requirements of the EC Machinery Directive; specifically, they must have effective technical measures to protect against potential mechanical hazards. • Perform regular maintenance. 03.00|1440828 ROTA THW3 |en... - Page 17 • Do not reach between the chuck jaws. • Wear protective gloves. • Follow the safety and accident prevention regulations when operating the chuck, especially when working with machine tools and other technical equipment. 03.00|1440828 ROTA THW3 |en...
- Page 18 If an incorrect clamping position is chosen for the chuck jaws on the workpiece, the base and top jaws may become damaged. • Observe maximum positions of base and top jaws. • The diameter of the workpiece may not be bigger than the chuck diameter. 03.00|1440828 ROTA THW3 |en...
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Page 19: Technical Data
Calculation examples can be found in the "Technology" chapter of the SCHUNK lathe chuck catalog. The maximum RPM stated is only valid with the maximum clamping force and when using the hard standard chuck jaws that go with the chuck. -
Page 20: Clamping Force-Rpm Diagrams
The chuck is in perfect condition and lubricated with SCHUNK LINOMAX plus special grease. If one or more of these prerequisites is modified, the graphs will no longer be valid. - Page 21 Technical data Clamping force/RPM diagram for ROTA THW3 200-52 Clamping force/RPM diagram for ROTA THW3 225-66 Clamping force/RPM diagram for ROTA THW3 265-81 03.00|1440828 ROTA THW3 |en...
- Page 22 Technical data Clamping force/RPM diagram for ROTA THW3 315-104 Clamping force/RPM diagram for ROTA THW3 400-128 Clamping force/RPM diagram for ROTA THW3 500-165 03.00|1440828 ROTA THW3 |en...
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Page 23: Calculations For Clamping Force And Speed
Technical data Clamping force/RPM diagram for ROTA THW3 630-165 Calculations for clamping force and speed Missing information or specifications can be requested from the manufacturer. Legend Total centrifugal force [N] Centrifugal torque of top jaws [Kgm] Effective clamping force [N]... - Page 24 According to VDI 3106: S ≥ 1.5. From this we can derive the calculation of the initial clamping force during shutdown: (+) for gripping from the outside inwards (–) for gripping from the inside outwards 03.00|1440828 ROTA THW3 |en...
- Page 25 M need to be added: The centrifugal torque of the base jaws M can be found in the table "Chuck data"( 3.1, Page 19). The centrifugal torque of the top jaws M is calculated as per: 03.00|1440828 ROTA THW3 |en...
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Page 26: Calculation Example: Required Initial Clamping Force Fsp0 For A Given Rpm N
Centrifugal torque of base jaw and top jaw specified in "Chuck data" table: For the centrifugal torque of the top jaw, the following applies: Centrifugal torque for one jaw: The chuck has 3 jaws, the total centrifugal torque is: 03.00|1440828 ROTA THW3 |en... -
Page 27: Calculation Of The Permissible Rpm Nzul In Case Of A Given Initial Clamping Force Fsp0
Identifying the permissible RPM: The calculated RPM n = 1495 is smaller than the maximum permissible RPM of the chuck n = 3200 (see "Chuck data" table ( 3.1, Page 19)). This calculated RPM may be used. 03.00|1440828 ROTA THW3 |en... -
Page 28: Grades Of Accuracy
Technical Supply Terms for lathe chucks as per DIN ISO 3442-2. Permissible imbalance The ROTA THW3 in ungreased state without top jaws corresponds to the balancing quality class 6.3 (according to DIN ISO 21940-11). Residual imbalance risks may arise due to insufficient rotation compensation being achieved (see DIN EN ISO 21940-11). -
Page 29: Torques Per Screw
120 160 200 290 400 500 1050 1500 (Nm) Tightening torques for mounting screws used to attach top jaws onto the lathe chuck (screw quality 12.9) Screw size M10 M12 M16 M20 M24 Tightening torques M (Nm) 03.00|1440828 ROTA THW3 |en... -
Page 30: Assembly
( 5.4.1, Page 33) Chuck assembly (with cylindrical recess) if required: Assembly preparation for the chuck with reduction or expansion adapter plate ( 5.4.2, Page 35) 4 Performing a functional check ( 6.4, Page 39) 03.00|1440828 ROTA THW3 |en... -
Page 31: Connection Thread Draw Tube
109.5 3.2 110 x 3.0 ROTA THW3 400-128 M140 x 2.0 20.1 135.0 3.2 135 x 3.0 ROTA THW3 500-165 M175 x 2.0 20.1 170 x 3.0 ROTA THW3 630-165 M175 x 2.0 20.1 170 x 3.0 03.00|1440828 ROTA THW3 |en... -
Page 32: Checking The Chuck Mount
Assembly Lathe chuck assembly 1 Chuck assembly (with cylindrical recess) ( 5.4.1, Page 33) Assembly preparation for the chuck with reduction or expansion adapter plate ( 5.4.2, Page 35) 03.00|1440828 ROTA THW3 |en... -
Page 33: Chuck Assembly (With Cylindrical Recess)
(max. + 0.5 mm) Ensure that the piston can be moved to its foremost position (jaw change). To do this, ensure that the dimensions for the attachment are complied with. • Push the chuck piston to its foremost position. 03.00|1440828 ROTA THW3 |en... - Page 34 ( 4, Page 29). • Check the chuck again for concentricity and axial run-out accuracy (see Fig. ( 5.4, Page 32)). The "Concentricity and axial run-out tolerances" table shows the concentricities and axial run-out accuracies to be achieved. 03.00|1440828 ROTA THW3 |en...
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Page 35: Assembly Preparation For Chuck With Reduction Or Extension Flange
• After assembly, ensure that the flange is in contact with the entire surface. • Check the concentricity and axial run-out of the flange (see Fig. ( 5.4, Page 32)). • Then the chuck is assembled ( 5.4.1, Page 33). 03.00|1440828 ROTA THW3 |en... -
Page 36: Function
Function Function Function and handling The lathe chucks of type ROTA THW3 are actuated using rotating closed-center or open-center hydraulic cylinders or via a static hydraulic cylinder. The axial tensile and pressure forces are converted to the radial jaw clamping force by the wedge angle in the pistons and thrust jaw. -
Page 37: Base Jaw Position
(chuck open). CAUTION It is vital that the maximum jaw position is adhered to so that all teeth are engaged for the force transmission from the chuck to the base jaws or top jaws. 03.00|1440828 ROTA THW3 |en... -
Page 38: Replacement Or Renewal Of Jaws
CAUTION Make sure that the workpiece is clamped halfway up the base jaw stroke. The workpiece must not be clamped at the end of the base jaw stroke. This can lead to the workpiece becoming loose. 03.00|1440828 ROTA THW3 |en... -
Page 39: Functional Testing
Risk of fatal injury to operating personnel if the top speed is exceeded, resulting in workpiece loss and parts flying off! • A reliable speed limiter must be installed in the machine tool or technical equipment and proof must be provided that the speed limiter is effective! 03.00|1440828 ROTA THW3 |en... -
Page 40: Maintenance
• Screw in the air bleed screw to the stop. For optimum grease distribution, the chuck piston must travel the entire clamping stroke several times after lubrication. After lubrication, check that the jaw change mechanism is working properly. ( 7.2, Page 41) 03.00|1440828 ROTA THW3 |en... -
Page 41: Technical Condition
If the clamping force has dropped too much or if the base jaws and piston no longer move properly, the chuck has to be disassembled, cleaned and relubricated. Only use original SCHUNK spare parts when replacing damaged parts. Checking correct functioning upon jaw change The mechanics of the jaw change notching/serrations must be checked at regular intervals;... -
Page 42: Maintenance Intervals
Disassembling and assembling the chuck The item numbers specified for the corresponding individual components relate to chapter drawings.( 9, Page 49) The lathe chuck can only be disassembled once it has been removed. ( 5, Page 30) 03.00|1440828 ROTA THW3 |en... - Page 43 Do not rotate the mount otherwise the hook (item 11) of the thrust jaw (item 2) may get damaged. Eccentric bolt (item 4) in the "lock" position. Remove screws (item 30) incl. the screw seal (item 40) of the chuck body. 03.00|1440828 ROTA THW3 |en...
- Page 44 (item 6). Remove the base jaws (item 22) from the guideway. Remove the wiper (item 10) incl. the inserted O-ring (item 41) radially from the guide groove. Remove the O-ring (item 48) from the chuck body. 03.00|1440828 ROTA THW3 |en...
- Page 45 (item 8) incl. O-ring (item 42) out of the thrust jaw. Remove the locking pin (item 9), spring (item 63), washer (item 62) and safety ring (item 61) from the bore hole. 03.00|1440828 ROTA THW3 |en...
- Page 46 Assembly: Push the eccentric bolt (item 4) completely into the bore hole and put in the "lock" position. Only use original SCHUNK spare parts when replacing damaged parts. The chuck is assembled in the same way, but in reverse order.
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Page 47: Spare Parts
Eccentric bolt Guide ring Driver Mount Monitoring pin Locking pin Wiper Hook Center sleeve Ring Jaw change key Eye bolt Base jaw Assembly key Screws Screws Screws Fuse Screw seal O-ring O-ring O-ring O-ring O-ring O-ring 03.00|1440828 ROTA THW3 |en... - Page 48 Quantity O-ring O-ring O-ring O-ring Screw seal O-ring Pressure piece Safety ring Washer Compression spring Compression spring Cylindrical pin Cylindrical pin Cylindrical pin Ball Cylindrical pin Compression spring Cylindrical pin Air bleed screw Lubrication nipples Emblem 03.00|1440828 ROTA THW3 |en...
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Page 49: Drawing
Drawing Drawing Full chuck 03.00|1440828 ROTA THW3 |en... - Page 50 Drawing Thrust jaw 03.00|1440828 ROTA THW3 |en...
- Page 51 Drawing Mount 03.00|1440828 ROTA THW3 |en...
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Page 52: Declaration Of Incorporation
2006/42/EC of the European Parliament and of the Council on machinery. The declaration is rendered invalid if modifications are made to the product. Product designation: Power lathe chuck with through-hole and jaw quick-change Type designation: ROTA THW3 200-52; 225-66; 265-81; 315-104; 400-128; 500-165; 630-165 ID number 1366679, 1366680, 1366681, 1366682, 1366706, 1366707,... -
Page 53: Appendix On Declaration Of Incorporation, As Per 2006/42/Ec, Annex Ii, No. 1 B
I, that apply to and are fulfilled for the scope of the incomplete machine: Product designation Wedge hook, power lathe chuck with through-hole Type designation ROTA THW3 200-52; 225-66; 265-81; 315-104 ID number 1366679, 1366680, 1366681, 1366682, 1366706, 1366707, 1366708, 1366710, 1366711, 1366712, 1366713, 1366715, 1366716, 1366717, 1366718, 1366719, 1366720, 1366721, 1366722, 1366723, To be provided by the System Integrator for the overall machine ⇓... - Page 54 Supplementary essential health and safety requirements to offset hazards due to lifting operations Supplementary essential health and safety requirements for machinery intended for underground work Supplementary essential health and safety requirements for machinery presenting particular hazards due to the lifting of persons 03.00|1440828 ROTA THW3 |en...
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